A study of the radiation degradation of styrene/alkane and α-methylstyrene/alkane copolymers

Cardona, Francisco, Hill, David J.T., Pomery, Peter J. and Whittaker, Andrew K. (2003) A study of the radiation degradation of styrene/alkane and α-methylstyrene/alkane copolymers. Polymer International, 52 11: 1711-1718. doi:10.1002/pi.1297


Author Cardona, Francisco
Hill, David J.T.
Pomery, Peter J.
Whittaker, Andrew K.
Title A study of the radiation degradation of styrene/alkane and α-methylstyrene/alkane copolymers
Formatted title
A study of the radiation degradation of styrene/alkane and α-methylstyrene/alkane copolymers
Journal name Polymer International   Check publisher's open access policy
ISSN 0959-8103
Publication date 2003-11
Sub-type Article (original research)
DOI 10.1002/pi.1297
Volume 52
Issue 11
Start page 1711
End page 1718
Total pages 8
Place of publication Chichester
Publisher John Wiley & Sons Ltd
Collection year 2003
Language eng
Subject C1
250502 Physical Chemistry of Macromolecules
780103 Chemical sciences
Abstract The effects of copolymer composition and microstructure on the radiation chemistry of styrene/alkane and alpha-methylstyrene/alkane copolymers have been studied. The primary radical species formed on radiolysis of the copolymers at 77 K, and identified by ESR spectroscopy, are the same as those formed during radiolysis of the homopolymers. The yields of radicals for the copolymer are as predicted assuming that the cross-section is proportional to the electron density of each component; however, there is some evidence of radical migration to aromatic groups at 77 K. Changes in molecular structure on irradiation were detected by using C-13 NMR spectroscopy. Evidence of the consumption of terminal double bonds, and chain scission in alpha-methylstyrene/alkane copolymers was found. Measurements of viscosity supported the mechanism of cross-linking predominating in styrene/alkane copolymers, while in alpha-methylstyrene/alkane copolymers chain scission was the major result of irradiation. (C) 2003 Society of Chemical Industry.
Keyword Polymer Science
Styrene-alkane Copolymers
Radiation Chemistry
Radiation Protection
Ethylene-propylene Copolymers
Low-density Polyethylene
Main-chain Scission
Cross-linking
Gamma-radiation
C-13 Nmr
Linear Polyethylene
Induced Crosslinking
Radical Decay
Gel Formation
Q-Index Code C1

 
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Created: Wed, 15 Aug 2007, 01:51:43 EST